Re: model weight calculation

From: Nick Ray <lasray_at_gmail.com>
Date: Mon, 12 Dec 2011 10:10:35 -0500

I use tubes on my Ministicks for high ceiling flights, but this thread got
me thinking about what is really happening to the rubber when the tubes are
used. When the motor is fully wound, the tubes are slid up the motor to the
hoods on the model. The role of the tubes is to keep the knots from
bunching on the hooks and wasting turns or stoping the prop. The tubes
constrict the rubber so that it can not bunch on the hooks. I thinking that
by constricting the rubber at the ends the tubes may be functioning as an
unintentional torque burner. I think more testing is needed to know what is
really going on.Then depending on what is happening we would need to
clarify the rules to specifically allow or disallow tubing.

Nick

On Mon, Dec 12, 2011 at 8:34 AM, <Warthodson_at_aol.com> wrote:

> **
>
>
> Nick,
> There is nothing in the A6 rules that would prohibit the use of tubing
> sleeves (or O rings). I don't think there is anything in the Ministick
> rules that would prohibit them either since the tubes are not used to
> restrict torque. LLP rules state " no gadgets of any kind are allowed on
> the airplane". I don't think a tube meets the definition of a gadget, but
> if it does then so would an "O" ring. Someone might argue that it is not
> on the airplane it is on the motor.
> Gary Hodson
>
>
>
> -----Original Message-----
> From: Nick Ray <lasray_at_gmail.com>
> To: Indoor_Construction <Indoor_Construction_at_yahoogroups.com>
> Sent: Sun, Dec 11, 2011 9:27 pm
> Subject: Re: [Indoor_Construction] model weight calculation
>
>
> Wire spacers, when used on a F1D are considered to be part of the model
> weight. As for O-rings, they are normally counted towards the rubber
> weight. However, they can be cut off the motor as needed after the flight
> to meet a maximum motor weight.
>
> I would personally define anything that stays affixed to the model as
> part of the model weight and anything that is not left on the model when
> the rubber is removed as part of the rubber weight. I would think the
> tubbing sleeves would fall into the same category as o-rings because they
> help handle the rubber. However, I could see an argument for calling them a
> structural element since they are a mechanism for preventing the rubber
> from bunching at the hooks.
>
> It will be interesting to hear what the list has to say because if
> tubing sleeves are ruled a rubber control mechanism then they would be
> illegal for Ministick, A-6 and LPP.
>
> Nicholas Ray
>
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Received on Mon Dec 12 2011 - 07:10:37 CET

This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET